Spiral wound gaskets

Both types have the same spiral made of stainless steel 316L and graphite filler – they differ only in the material of the outer ring. The 316L/graphite/316L design has a fully stainless steel outer ring, making it more resistant to corrosion and suitable for chemically aggressive environments or hygienic applications. The 316L/graphite/CS design uses a carbon steel outer ring – it is more cost-effective and fully adequate for standard industrial flanges where the outer ring is not in direct contact with the medium.

The outer ring (OR – outer ring) centers the gasket in the flange groove during installation and protects the spiral from mechanical damage during bolt tightening. The inner ring (IR – inner ring) prevents the graphite filler from bulging into the flow cross-section of the pipe, which is especially important for high-pressure media or applications sensitive to contamination. The combination of both rings (IOR type) is recommended for most industrial flanges and eliminates the most common installation errors.

POWERgasket SWG-IOR gaskets can withstand pressures up to 320 bar. The temperature range depends on the filler material – graphite filler allows use up to approximately +550 °C (in oxidizing atmosphere up to +450 °C). For applications requiring a different temperature or chemical range, designs with PTFE or mica filler are available – please contact us with your specifications.

Yes. We keep the most common sizes and material combinations in stock. An online overview of stock availability is available on the website with filtering options by diameter, thickness, material, and design. Non-standard sizes or special material combinations are supplied on request – please contact us with your desired specifications.